Pressure vessel and method of manufacturing pressure vessel

Abstract

A pressure vessel includes a vessel part including a liner and a fiber-reinforced layer formed to surround an outer surface of the liner, and a nozzle part provided at an end of the vessel part, wherein the nozzle part includes a nipple having at least a portion inserted into the liner, and an inner sleeve inserted between the outer surface of the liner and an inner surface of the fiber-reinforced layer and having a flow path groove formed to extend in an extension direction of the liner.

1 . A method of manufacturing a pressure vessel, the method comprising:
 inserting a nipple into a liner;   fixing an inner sleeve to an outer surface of the liner by a swaging process;   applying a hold pressure to an inside of the liner;   forming a fiber-reinforced layer by braiding a reinforced fiber to the outer surface of the liner when the hold pressure is applied to the inside of the liner;   impregnating the fiber-reinforced layer with a resin; and   curing the impregnated resin;   wherein, during impregnating, at least a portion of the impregnated resin moves in an extension direction of the liner through a flow path groove formed in the inner sleeve.   
     
     
         2 . The method of  claim 1 , further comprising, before impregnating the fiber-reinforced layer with the resin:
 screw-coupling a reinforcement ring to an outer surface of the nipple; and   fixing an outer sleeve to an outer surface of the fiber-reinforced layer and to an outer surface of the reinforcement ring.   
     
     
         3 . The method of  claim 1 , wherein, during impregnating, the resin flowing in the fiber-reinforced layer is discharged through a fluid hole formed in the outer sleeve.